Answer to Question #204805 in Physical Chemistry for Jake

Question

2)Write the equilibrium expression (K) for:

a)4NH3(g) + 5O2(g) ⇌ 4 NO(g) + 6H2(g)

b)Ag2CO3(s) +H2O ⇌ 2 Ag (aq) + CO3(aq)

I need help with this

Answer 1

We know that concentration of solid liquid (H₂O) does not change with time.

So,

[solid]=1

[liquid ]=1

So,

a)4NH_3(g) + 5O_2(g) ⇌ 4 NO_(g) + 6H_2(g)

K= [NO]⁴[H₂]⁶$\div$ [NH₃]⁴[O₂]⁵

(b)Ag₂CO₃(s) +H₂O ⇌ 2 Ag _(aq) + CO_3(aq)

K=[Ag⁺][CO₃^2-]

This is the equilibrium expressions because [Ag₂CO₃]=1 and[CH₂O]=1